Trying to figure out how a self-employed person actually pays the self-employment tax deferred for 2020 *(see Schedule SE, Part III).  I can't seem to find anything in the SE tax instructions, on the IRS website, or in the filing instructions letter generated by ProSeries.  I know 1/2 is due by 12/31/21 and other 1/2 due by 12/31/22.  Is there a specific transmittal form and/or address to use?  Can you set up in ProSeries to automatically epay on those dates?  Do you just go to IRS website and say you want to epay balance due for 2020?  HELP